{"id":"USN-7939-2","summary":"linux-azure-fips vulnerabilities","details":"\nJean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered\nthat the Linux kernel contained insufficient branch predictor isolation\nbetween a guest and a userspace hypervisor for certain processors. This\nflaw is known as VMSCAPE. An attacker in a guest VM could possibly use this\nto expose sensitive information from the host OS. (CVE-2025-40300)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - Cryptographic API;\n  - ACPI drivers;\n  - HSI subsystem;\n  - I3C subsystem;\n  - InfiniBand drivers;\n  - Media drivers;\n  - Network drivers;\n  - Pin controllers subsystem;\n  - AFS file system;\n  - F2FS file system;\n  - SMB network file system;\n  - Padata parallel execution mechanism;\n  - Timer subsystem;\n  - Tracing infrastructure;\n  - Memory management;\n  - Appletalk network protocol;\n  - Networking core;\n  - Netfilter;\n(CVE-2022-49026, CVE-2022-49390, CVE-2023-52854, CVE-2024-35867,\nCVE-2024-47691, CVE-2024-49935, CVE-2024-50061, CVE-2024-50067,\nCVE-2024-50095, CVE-2024-50196, CVE-2024-53090, CVE-2024-53218,\nCVE-2024-56664, CVE-2025-21727, CVE-2025-21855, CVE-2025-37838,\nCVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964,\nCVE-2025-39993, CVE-2025-40018)\n","modified":"2026-05-23T01:34:18.159018451Z","published":"2025-12-16T22:25:38Z","related":["UBUNTU-CVE-2022-49026","UBUNTU-CVE-2022-49390","UBUNTU-CVE-2023-52854","UBUNTU-CVE-2024-35867","UBUNTU-CVE-2024-47691","UBUNTU-CVE-2024-49935","UBUNTU-CVE-2024-50061","UBUNTU-CVE-2024-50067","UBUNTU-CVE-2024-50095","UBUNTU-CVE-2024-50196","UBUNTU-CVE-2024-53090","UBUNTU-CVE-2024-53218","UBUNTU-CVE-2024-56664","UBUNTU-CVE-2025-21727","UBUNTU-CVE-2025-21855","UBUNTU-CVE-2025-37838","UBUNTU-CVE-2025-37958","UBUNTU-CVE-2025-38352","UBUNTU-CVE-2025-38666","UBUNTU-CVE-2025-39964","UBUNTU-CVE-2025-39993","UBUNTU-CVE-2025-40018","UBUNTU-CVE-2025-40300"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7939-2"}],"affected":[{"package":{"name":"linux-azure-fips","ecosystem":"Ubuntu:Pro:FIPS-updates:20.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-fips?arch=source&distro=fips-updates%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1157.164+fips1"}]}],"versions":["5.4.0-1022.22+fips1","5.4.0-1073.76+fips1","5.4.0-1074.77+fips1","5.4.0-1076.79+fips1","5.4.0-1078.81+fips1","5.4.0-1080.83+fips1","5.4.0-1083.87+fips1","5.4.0-1085.90+fips1","5.4.0-1086.91+fips1","5.4.0-1089.94+fips1","5.4.0-1090.95+fips1","5.4.0-1091.96+fips1","5.4.0-1094.100+fips1","5.4.0-1095.101+fips1","5.4.0-1098.104+fips1","5.4.0-1100.106+fips1","5.4.0-1101.107+fips1","5.4.0-1103.109+fips1","5.4.0-1104.110+fips1","5.4.0-1105.111+fips1","5.4.0-1106.112+fips1","5.4.0-1107.113+fips1","5.4.0-1108.114+fips1","5.4.0-1109.115+fips1","5.4.0-1110.116+fips1","5.4.0-1111.117+fips1","5.4.0-1112.118+fips1","5.4.0-1113.119+fips1","5.4.0-1114.120+fips1","5.4.0-1115.122+fips1","5.4.0-1116.123+fips1","5.4.0-1117.124+fips1","5.4.0-1118.125+fips1","5.4.0-1119.126+fips1","5.4.0-1121.128+fips1","5.4.0-1122.129+fips1","5.4.0-1123.130+fips1","5.4.0-1124.131+fips1","5.4.0-1126.133+fips1","5.4.0-1127.134+fips1","5.4.0-1128.135+fips1","5.4.0-1129.136+fips1","5.4.0-1130.137+fips1","5.4.0-1131.138+fips1","5.4.0-1132.139+fips1","5.4.0-1133.140+fips1","5.4.0-1134.141+fips1","5.4.0-1135.142+fips1","5.4.0-1136.143+fips1","5.4.0-1137.144+fips1","5.4.0-1138.145+fips1","5.4.0-1139.146+fips1","5.4.0-1140.147+fips1","5.4.0-1142.149+fips1","5.4.0-1143.150+fips1","5.4.0-1145.152+fips1","5.4.0-1147.154+fips1","5.4.0-1148.156+fips1","5.4.0-1149.157+fips1","5.4.0-1151.158+fips1","5.4.0-1152.159+fips1","5.4.0-1153.160+fips1","5.4.0-1154.161+fips1","5.4.0-1155.162+fips1"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-azure-fips-cloud-tools-5.4.0-1157","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-azure-fips-headers-5.4.0-1157","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-azure-fips-tools-5.4.0-1157","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-buildinfo-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-cloud-tools-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-headers-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-image-unsigned-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-image-unsigned-hmac-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-modules-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-modules-extra-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"},{"binary_name":"linux-tools-5.4.0-1157-azure-fips","binary_version":"5.4.0-1157.164+fips1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:FIPS-updates:20.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7939-2.json"}}],"schema_version":"1.7.5"}